Biliary Obstruction
Biliary Obstruction Basic Information Definition Large colon displacement and cholelithiasis are the most common causes of acute biliary obstruction in adult horses. Rarely, foals may develop biliary obstruction secondary to…
Atonic/Hypotonic Bladder
Atonic/Hypotonic Bladder Basic Information Definition Dysuria or incontinence caused by sensory and motor deficits of the nervous system Synonym(s) Atonic or paralytic bladder, lower motor neuron bladder, spastic bladder, upper…
Arsenic Toxicosis
Arsenic Toxicosis Basic Information Definition Arsenic toxicosis is the syndrome caused by exposure to injurious amounts of inorganic arsenic (trivalent arsenic, pentavalent arsenate) or organic arsenic (aliphatic, aromatic, and phenylarsenic…
Ascariasis
Ascariasis Basic Information Definition Mange caused by a variety of mites, including the chorioptic (leg mange) and psoroptic families Synonym(s) Mange Epidemiology Genetics and Breed Predisposition Chorioptic mange typically affects…
Anemia, Immune-Mediated
Anemia, Immune-Mediated Basic Information Definition Anemia resulting from a loss of erythrocytes caused by increased destruction by autoantibodies and complement. Synonym(s) • Autoimmune hemolytic anemia • Immune-mediated hemolytic anemia (IMHA)…
Atrioventricular Block, First Degree
Atrioventricular Block, First Degree Basic Information Definition Delayed conduction of the supraventricular impulse at the level of the atrioventricular (AV) node, resulting in a prolonged PQ interval. Synonym(s) First-degree AV…
Aflatoxin Toxicosis
Aflatoxin Toxicosis Basic Information Definition Aflatoxins are hepatotoxic mycotoxins (mold toxins) produced by various Aspergillus spp. and other fungi, most commonly A. flavus and A. parasiticus. Aflatoxin can contaminate a…
Aminoglycoside Toxicosis
Aminoglycoside Toxicosis Basic Information Definition The aminoglycosides are large molecules with numerous amino acid groups, making them basic polycations that are highly ionized at physiologic pHs. These physical properties are…
Adrenal Insufficiency, Relative
Adrenal Insufficiency, Relative Basic Information Definition Relative adrenal insufficiency (RAI) is a condition in which the adrenal gland, notably the adrenal cortex, is unable to respond (ie, secrete cortisol) to…
